Bijou All Tube Futterman Headphone Amplifier
Jul 25, 2009 at 6:56 PM Post #2,794 of 4,278
once again, many thanks guys.

Quote:

Originally Posted by Ferrari /img/forum/go_quote.gif
Zkool448, I knew you are busy with something beautiful, but this is just far above my expectation.
Excellent work… I like the originality!!!



Ferrari, just illustrating the possibilities of what can be done and hope to inspire others to build one of their own, just as I watch your builds as my greatest motivation.

To receive such compliment from someone like you who builds some of the BEST cases around here acknowledge my work is remarkably flattering.

 
Jul 25, 2009 at 9:50 PM Post #2,795 of 4,278
Zkool, this is absolutely stunning! Wonderful!

Commercial products don't look that good
cool.gif
 
Jul 26, 2009 at 5:45 AM Post #2,796 of 4,278
wow, that's insanely beautiful, zk. The amount of work you put into the cases is just astounding. The coloring is great. What wood and paint did you use? I really wish I was able to do things like that.
 
Jul 27, 2009 at 3:58 AM Post #2,798 of 4,278
cheers guys
wink.gif


holland, it's the same mdf build you saw earlier at the casework thread. Aside from many hours of sanding, it only took a can of primer and a can of high heat silver metallic paint to finish.

adamus, will post one up a quick clip a week from today when I return from vacation!

 
Jul 28, 2009 at 4:12 AM Post #2,799 of 4,278
finally got around to soldering in Regal's Mod, but have some odd voltage readings.

with B+ = 250V, i'm reading 158V at pin6/phase splitter input of the my 6N1P. R3=30K.

walking through some maths...

voltage drop across R3: 250V-158V= 92V
current at pin6: 92V/30K= 3.1mA

Regal speced the idle current at 5mA and according to the Tweaks page at cavalliaudio.com, i should be getting around 100V at pin6.

in my PS, i have the cap multiplier mod, TX is 370DAZ, and rectifier tube EZ81.

-as it stands now, is my PS "safe" to run at 3.1mA? i have yet to plug in my headphones for a listen.
-if i want to crank up the idle current, do i need another transformer, and how would i go about doing this?
 
Jul 28, 2009 at 5:17 AM Post #2,801 of 4,278
Quote:

Originally Posted by runeight /img/forum/go_quote.gif
It seems like your PS is doing fine.

What cathode resistor are you using for the first stage?



cathode resistor/R2 = 1.5K per your specs for a 6N1P. but with Regal's Mod...can i/should i lower it. i should be able to get more idle current with lowering it...no? up or down
cool.gif
good thing i socketed R2.
 
Jul 28, 2009 at 5:33 AM Post #2,802 of 4,278
Aha. Go back to the Regal mod Bijou page and scroll down to the bottom.
smily_headphones1.gif


Socketing R2 is a good idea.
ksc75smile.gif


Hopefully this will give you the correct voltages.
 
Jul 28, 2009 at 11:27 AM Post #2,803 of 4,278
Quote:

Originally Posted by runeight /img/forum/go_quote.gif
Aha. Go back to the Regal mod Bijou page and scroll down to the bottom.
smily_headphones1.gif


Socketing R2 is a good idea.
ksc75smile.gif


Hopefully this will give you the correct voltages.



doh...i can't believe i missed that chart
redface.gif
. i know i have a bunch of 182R in the parts bin. thanks Alex!!!
 
Jul 28, 2009 at 8:19 PM Post #2,804 of 4,278
Quote:

Originally Posted by zkool448 /img/forum/go_quote.gif
zkbijouglamoursmv3.jpg


More pics of my build at the build gallery. Cheers!



Hello. I am a long-time lurker here so I briefly know of some of you. I am incredibly inspired to say the least, particularly when looking at zcool's builds. Ultimately I have decided that I will DIY my next amp.
 
Jul 28, 2009 at 10:58 PM Post #2,805 of 4,278
Regal's mod is done
k701smile.gif
. sounds great. highly recommended.

at pin6, i'm getting 114V in one channel and 103V in the other - a difference of 0.4mV. B+ is 250V. anything i should bother with?
 

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